Hoisting apparatus



(No Modem 4 sheets-shet'l.

F. P. MILLS, HOISTING APPARATUS.

No. 376,672. I Patented Jan. 17, 1888.

(No ModeL) 4 Sheets-Sheet 2. F. P. MILLS- A HOIS'I'ING APPARATUS.y

Patented Jan. 17, 1888.

@wam/Lito@ W4 f @www (No Model.) 4 Sheets- Sheet 3.

P. P. MILLS. Hol-STINGAPPARATUS.

No. 376,672. Patented Jan. 17,'1888.

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(No Medel.) 4sheeee-sheee 4.

f I'. P. MILLS. Y

HOISTING APPARATUS. No. 376,672. Y Peten'eed Jen. 17, 1888.v

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NITLED STATES PATENT r11-ien.

FRANK P. MILLS, OF CHICAGO, ILLINOIS.

HolsTiNe APPARATUS.

SPECIFICATION forming part of Letters Patent No. 376,672, dated January 17, 1888.

API-nennen mea June 18,1887. serial No. 241,711. (Nomodei.)

holds of vessels cargoes of ore, coal, and such like material commonly removed in tubs, which tubs, after being swung over the dock, are dumped to discharge their contents.

My invention consists in the various novel features of construction, hereinafter described, illustrated in the accompanying drawings, and particularly dened in the claims at the end of this specification.

Figure lis a front View of the hoist-ing apparatus embodying my invention. Fig. 2 isa view, partly in central' vertical section and partly in side elevation, of the mechanism shown in Fig. l. Fig. 3 is adetail view in cross-section through theswivel-bracket at the top ofthe mast, the section being taken just above the pulley. Fig. 4 is an enlarged view in horizontal section through the mast, above the traveling carriageof the dumping-arm, the dumping-arm, thejib, and the mechanism for adjusting the jib being shown in plan. Fig. 5 is an enlarged detail view, in front elevation, (parts being shown in vertical section,)

of the lower portion of the mast and `jib andtraveling carriage. Fig. 6 is an enlarged detail view from the rear side of the upper portion of the mast and the swivel-bracket attached thereto, the pivoted top bearing of the mast being shown in section. Fig. 7 is an enlarged detail view, partly in section and partly in side elevation, of the clutch device and the bearing-plates adjacent thereto. Fig. 8 `is a detail View in vertical cross-section on linemx Fig. 9 is a detail plan view of the clutch.

In the accompanying drawings my invention is shown as applied to a form of hoisting apparatus particularly designed for unloading cargoes of ore and coal from the holds of vessels, and while I .have shown the mechanism for hoisting but a single tuby at each lift, it will be readily understood that in practice a number of similar` devices 'may be arranged side by side at distances apart approximating the distances between the hatchways of ordinary vessels.

A designates a suitable frame-workerected at any desired height above the level of the dock, andl by preference provided with y the serve to receive the ore or coal froml the delivery-chute B and deposit the same at any desired points 4upon the dock. chute D, which is ofthe usual or suitable construction,-is sustainedupon the frame-Work A2, a portion of which frame-workcomprises the vertical beams A3 and A, which vrise slightly above the top ofthe mast C.

Between the vertical beams A3 and A* ex:`

tend the upper and lower cross-beams, Ai' and A6, within which are pivotally sustained the upper and lower ends of the mast C. The plv,- otal bearing of the upper end ofthe mast .C consists, preferably, of thetubes D and D', the

'rails A', whereon will travel the cars which v i The deliverytube D beingpassed through a suitable openl ing in the cross-beam A5, while the tube D tits within a similar opening formed in the cross-head c of the mast C, and the inner ends of these tubes D and D are-planed oil to form a smooth bearing, and their anges d and d are bolted, respectively, to the inner faces of the cross-beam A5 and the crosshead c of the mast. Through the tubes Dand'D passes theY vpivot-bolt E, the headed end of which bears upona plate or washer, @its threadedv end be? ing provided with a suitable nut, e; and from this construction :it will be seen that the pivotbolt E serves to connect the cross-head c of the mast to the cross-beam Ain such manner that the mast can swivel with respect to such beam. The mast C comprises the side bars, vc and c2, which rest upon the base-bar C at their lower ends, and at their upper ends are united by the crosshead c, and the pivotal bearing for the lower end of the mast is effected by means of the tubesF and F', the tube F entering a suitable hole formed through the base-barC', while the tube F enters a similar hole formed IOO in the cross-bar A6 below the bottom of the f will be bolted to the respective bars C and A, and from the face of the flange f rises the annular bearing plate or rib f 2, within which projects the lower end of the tube F, and against the upper edge of which vbears the lower face of the flange f. From this construction it will be seen that when the tubes F and F' have been properly set within the base-bar C' and cross-beam A, to which they are respectively attached, and the lower end of the tube F has been placed within the annular rib or platef", the upper edge of this annular rib will a'ord a seat or bearing upon which the lower face of the flangef can be turned, and this annular rib will also guard against any danger of the lateral displacement of the lower end of the mast.

The outer ends of the base-bar C' will be provided with the journal-blocks G, from which project the journals g, that serve to pivotally sustain the inner ends of -the side bars H and H' of the jib, the inner ends of these bars being provided with suitable bearingblocks adapted to receive the journals g. The side bars H and H' of the jib converge at their outer ends, which are connected together, as seen in Fig. 4, and at the outer ends of these bars is j ournaled the pulley I, sustained in a suitable bearing-bracket, t', and having its periphery grooved to receive the hoistingrope J, which is trained over the pulley.

Upon the .under side of the outerend 'of the jib is suitably bolted the detent device K, the side arms, k, of which are preferably cast in piece with the top rib or plate, k', and the bottom plate, 7a2, and are formed at such distance apart as to permit the hoisting-rope J to move freely between the arms 7c and yet arrest the stop J' after the hoistingrope has received an initial lift. These arms k of the detent extend some distance in front of the pulley I, and thus serve to prevent the contact of the stop J with the pulley I, and consequently bear the strain of the hoisting-rope when the stop J is arrested by the arms. These arms 7c are curved, in order to permit the stop or ball J to ride over the outer face thereof as the jib is lifted into theopen socket or back check,77 k3,pref erably formed in piece with the bottom plate, k, at the base of the arms k. The under side of this open socket or back check, k3, is slotted, so as to permit the ball to ride freely into the socket, as shown by dotted lines, Fig. 2,

. and when it is in. this position it is obvious that the hoisting-rope will extend between the arms k and the sides of the socket 7c3.

My purpose in providing a back check or socket for the stop J is to insure the outward movement of the empty tub as the hoistingrope is released for the purpose of lowering the tub, and it is obvious that so long as the stop J' is within the socket the tub will be swung outward as the jib is lowered, and hence will be returned to the proper position for reloading.

From the foregoing construction it will be seen that the side bars H and H', of which the jib is constructed, are connected at their inner ends to the base-bar C in such manner that the jib is free to swing in vertical direction, and as the base-bar C' is capable of being turned with a corresponding movement of the mast it is apparent,also,that thejib and mast will turn in unison about the swirelbearings of the mast. My purpose in thus making provision for the lateral movement of the mast andjib is to permit the outer end of the jib being brought more directly over the hatchways ot' the vessel to be unloaded; and in order to permit the mast and jib to be fixed when brought to the proper position above the hatchway I have provided the segmenttracks L, which arc fixed to the cross-beam A near` the outer ends of and beneath thebase-bar C', and these segment tracks L will,by preference,be formed with grooves Z. adapted to receive the headed ends of the adjusting bolts L', which pass through the ends of the base-bar C' and are provided with the set-nuts Z', which serve to firmly hold the base-bar C' at any desired point upon the segment-tracks. To the upper end of' the mast C will be bolted the buii'er-framc M, which projects, as seen in Fig. 2, some slight distance from the faceof the mast, and serves to arrest the vertically-swinging movement ofthe jib, and the extent of the down` wardmovement of thejib will belimited by a stay-rope, h2, one end of which is 4shown as connected tothe top of the mast, while the opposite end is attached to a coiled spring, if, fastened to the outer cnd of the jib. This stay-ropeh2 will be of suitablelength,so that by the adjustment of the rope the extent of the downward movement of thejib can be varied as desired.

Near the top of the mast C, and between the side bars c and e?, are fixed the journalbrackets N, in which will be jonrnalcd the grooved pulley N', over which the hoistingrope J will pass as it comes from the pulley I, mounted on the outer end of the jib, and from the pulley N' this hoisting-rope will pass over other pulleys to a suitable winding-drum, as will be'presently described.

From the construction of parts as thus far defined it will be seen that when power is'applied to the hoisting-rope thisrope will be drawn over the pulleys N' and I, thereby lifting the tub or load until the stop or ball J',that is fixed at a suitable point upon the hoistingrope, strikes the outer edges of the arms k of the detent device K, and the movement of the vhoisting-rope over the pulley I being thus ar rested, the further winding of this rope will cause the jib to swing in vertical direction until its upper end strikes against the bufferframe M at the top of the mast. means an initial vertical lift will be given to theloaded tub, which, as the hoisting-rope is further wound, will be swung over the point at which the load is to be discharged. As the jib is thus swung upward, the stop or ball J'v on the hoisting-rope will ride against the face of the arms k of the detent K until the stop By this ICO LIO

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enters the backV check or socket, k3, as shown by dotted lines in Fig. 2; and it is obvious lthat when the hoistingrope is released, after the load of the tub has been dumped, 'the stop J will be retained within the back check or socket, k3, until the jib has swung downward a sufficient extent to prevent the tub from lowering into the chute B, after which the stop J will pass from out the socket. It is also apparent that by thus temporarily retaining the stop J within the back check theinitial downward movement of the jib is insured.

In order to effect the automatic dumping or y discharge of the content-sof the loaded tubs,

I have provided the mechanism to be next described. To the side bars c' and c'z of the mast are fixed the rails cand c^*,upon which will move the wheels o of the traveling carriage O, this traveling carriage consisting of a castme'tal open frame, in the ends ot' which the axles of the wheel o are journaled, and about the center of which are formed suitable bearings for the axle of the pulley O', over which the winding-rope will pass.

To the traveling carriage rO, near its top, are bolted the inner ends of the side bars p and p of what I term, for convenience, the dumping-arm77 P, these side bars being braced by standards p, that extend from the bars to a suitable bearing near the lower portion of the carriage O. The niain portions of the side bars p and p' are parallel andfat a'slight distance apart; but their outer ends are expanded or bent laterally, forming guide-arms to insure the delivery of the hoisting-rope into engagement with a suitable clutch or other retaining device as this rope isswung inward by the raising of the jib. I

In order to properly retain the rope and prevent its backward movement after it has thus been caught by theside bars of the dumpingarm, I have placedupon the dumping-arm the,

clutch device R, (more particularly illustrated in Figs. 7, S, and 9 of the drawings) the shank r of this clutch being journaled within the rear portion of the bearing-plates R' and R,

which are bolted together and are held in position between the side bars p and p of the dumping-arm.

The bearing-plate R' is provided upon its upper surface with-the flanges r', that-rest upon and are bolted tothe upper faces of the side arms p and p,and the lower bearingplate, R2, is boltedto the under side of the upper bearing-plate', R', as shown in Fig. 7. Each of the bearing-plates R and Rz is bifurcated, and the inner faces of their'forked ends arejoined together to form the journalbearing for the shank r of the clutch, while the outer portions of their forked ends are inclined, so as to properly direct the hoistingrope into the jaw of the clutch, as will bepresently explained.

The clutch R is provided at the rear end of its shank with the weighted arm R3, and at its opposite or front end is formed with thehook arm or jaw R* and the upwardly-extending rebase of the releasingarm R5 of the clutch is y formed the inclined surface r3, against which will bear the sleeve J2, that is ycarried upon the hoistingrope in a manner free to slide thereon. y

The purpose of the inclined surface r at the base of the releasing-arnrR5 is to cause the hook-arm Rtof the clutch to be swung in such manner that yitsbent end will pass in front of thetrip-sleeve J2 of the hoisting-rope when the jib has been raised to asuffieient extent to bring the trip-sleeve against the inclined surface r, and thus prevent the backward movement of the trip-sleeve and-the hoisting-rope away from thedumpingarm. This checking of the backward movement of the hoisting-rope isimportant, since, if no such provision were made, the'rope would sway back and forth, and consequently would prevent the load being dumped with certainty into the proper receptacle. The weighted arm R3 is so disposed withrespect to the arms R4 and 'R5 of the clutch thatitwill temporarily retain the hook-arm either in position for holding the hoisting-rope or in position to permit the hoisting-rope to swing outward, according as this weighted arm is shifted toone side or the other ofv the vertical central line, as will be presently explained. The extent of the swinging movement of the clutch in `one direction will belimited by means ofthe stop T5, formed at the base of the releasing'farm R5 and engaging with a shoulder, r6, formed .on the plate R2, While the swinging movement'of the clutch in opposite direction will be limited by the contact of the hook-arm R4k with the inner face of the shoulder r9. pose of the releasingarm R5 of the clutch is to throw the hoolcaim R'l at the proper timeout IOO IIO

The purof action, so that when the jib is lowered the l ing-arm is to be used or not; and it is equally obvious that other forms of retaining device will serve the purpose of the clutch. I therefore wish my invention to be understood as embracing broadly within its scope thev employment of arms for directing the hoistingrope into a suitable retaining device; and

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while the term clutch is employed for convenience of description, I do not wish the claims to be understood as restricted to this particular form of retaining device.

To the lower end of the carriage O is fixed a cup-shaped plate, S, and upon the top of the base-bar C', and between the side bars c and c2 of the mast, is placed a block, s, upon the top of which is fastened acup-shaped plate, S', and between the cup-shaped plates S and S is held the coiled spring S2, the purpose of which will presently appear. To an eye or staple, o', formed at the bottom of the carriage is connected one end of the rope T, which rope passes through suitable holes formed in the plates S and S', and through the intermediate spring, S2, and also through a hole formed in the block s, and through the tubes F and F around a grooved pulley, T', that isjournaled in a suitable bracket aiiixed to the under side of the cross-beam A, and thence over a grooved pulley, Tjournaled to the vertical beam A4, and is attached at its lower end to the counter-balai] ce T3. The p urpose of the counter-balance T3 is to prevent the travelingcarriage O from beinglifted during the initial movement of the hoisting-rope and until the outer end of the jib has been swung upward into contact with the bufferframe M at the toprof the mast, a further purpose of this counter-balance being to restore the carriage O to its lowest position when the load has been discharged from the tub and the hoisting-rope is released. The spring S2 serves to break the shock of the downward movement of the carriage, and to prevent injury therebyl to the basebar C' of the mast. At

the top ot' the mast, and within suitable brackets, V and V', are jonrnaled the ends of the swivel-frame NV, within which is mounted the grooved pulley \V', over which is trained the hoisti ng-rope that passes thence to suitable mechanism for winding the same. The swivelframe WV is formed of the side bars w and end bars,-w', from which the journals of this frame project, and the lower journal, 202, of this swivel-frame is perforated to permit the hoisting-rope J to pass freely through this journal and over the pulley WV. It will thus be seen that the hoisting-rope J passes first over the pulley NV', thence downward over the pulley O' ot' thetraveling carriage, thence upward over the pulley N at the top of the mast, thence over the pulley I at the outer end of thejib, and thence between the arms 7c of the detent device to the bail of the tub, to which it will be attached by any suitable form of hook or catch.

From the foregoing description the operation ot' my improved apparatus will be seen to be as follows: Assuming the parts to be in the relative position shown by the fulllines in Fig. 2, if now the hoisting-rope be wound for the purpose of lifting the loaded tub from the vessel, it is obvious that the weight of the traveling carriage O, aided by the counterbalance ([3, will prevent the vertical movement of this carriage until the loaded tub has received its initial vertical lift and until the stop or ball J' has come into engagement with the detent device K at the outer endvof the jib, and until the j ib has been swung upward by the further winding of the hoisting-rope to such extent that the outer end of the jib is brought into contact with the buffer-frame M at the top of the mast. When the parts have assumed this position,it will be found that the tripping-sleeve J", which is free to move upon the hoisting-rope, and adjacent the tub, will have been guided,by the expanded ends of the arms p and p into engagement with the clutch R, between the forks ofthe plates R' R, and will bear upon the inclined surface r* at the base of the releasing-arm R5 of the clutch with such force as to overcome the force of the weighted arm R3 and cause the bent or hooked end of the hook-arm RL to swing in front of the sleeve J, and thus prevent its outward movement, and so check any further tendency ofthe hoisting-rope and tub to swing. rlhe weighted arm R" will retain the hook-arm R4 in this position until the releasing-arm R5 is depressed, as will presently appear. As the hoisti ngrope continues to be wound, the weight of the traveling carriage O and of the counter-balance T3 will be 0vercome,and the dumpingarm will be moved in vertical direction to the position shown by the dotted lines in Fig. 2. As the dumpingarm is thus moved upward,the flanged portion or shoulder]- of the sleeve J'l will enter the recess o-Z in the upper part of the bearing-plate R', which recess is smaller at its bottom than the shoulderj, and in doing so will bear upon and depress the end of theV releasing-arm R5,

causing this arm to swing downward, and

forcing the weighted arm R to the other side of its center ot' oscillation and causing the hook-arm R"r to be swung away from in front of the tripping-sleeve J2, and it is obvious that the weighted arm R3 will temporarily retain the clutch in this position. The further up- Iward movement of the dumping-arm will cause the lifting of the tripping-sleeve J", which is free to slide upon the hoisting-rope, and as this sleeve is connected by the chain J3 with the bottom of the tub it will cause the tub to be upset and its contents to be dumped into the chute B. If, now, the hoisting-rope be unwound,it is obvious that the weight of the carriage O and of the counter-balance T1 will restore the carriage and the dumping-arm to their lowest position, after which thejib will swing downward and the tub will be lowered to the desired position. It is obvious that the back check 7c3, at the base of the detent K on the end of the jib,will cause the tub to4 swing outward as the j ib is lowered, and the hoistingrope will pass freely over the clutch and the guide-arms during this outward swing.

lt is obvious that if the distance between the hatchways of the vessels to be unloaded is greater than the distance between the masts of the adjacent hoisting devices the jibs of either or both masts can be moved laterally,

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and,by means of the segment-tracks L and adjusting-bolts L', can be set at` such position as to bring the tubs above the hatchways. My purpose in mounting in a swivel-bracket thel pulley W', over ,which the hoistingrope passes from near the top of the mast to the hoisting-engine, is to permit the position of this pulley to remain constant irrespective of any shifting of the mast and the jib made necessary for the purpose of bringing the outer end of thejib above the hatchway of the vessel.

It will be readily understood that the details of construction abve set out may be con-V siderably varied by the skilled mechanic without departing from the spirit of my invention, and that cert-ain features of the invention may be used independently of the others.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is- Y,

1. In a hoisting apparatus, the combination, with a suitable sustaining-frame and with a mast pivoted at the top and bottom, of a based bar to which saidmast is connected, and a jib comprising sidebars pivotally connected at their inner ends tothe ends of said base-bar, said base-bar serving to sustain both the mast and the jib, and being adjustably connected with the framefwork, whereby the position of the mast and jib with respect to said framework may be simultaneously adjusted, substantially as described.

2. Inahoisting apparatus, the combination, with a suitable sustaining-frame, of a mast pivotally mounted therein, a jib comprising side bars, a base-bar to which saidside bars of the jib,are pivoted,'and segment-plates and adjusting-bolts for determining the position of the mast and jib, substantially as described.

3. In a hoisting apparatus, the combination, with the jib pivotedto swing in vertical direction and a hoisting-rope passing over said jib, of a clutch adapted to lock the hoistingrope against direct outward movement when the jib is raised, substantially as described.

4. In ahoisting apparatus, the combination, with a jib pivoted to swing in vertical direction anda hoisting-rope passing oversaidjib, of a clutch tor retaining the hoisting-rope as the jib is raised, and expanded guide-arms for directing said rope into the clutch, substantially as described.

5. In a hoisting'apparatus, the combination, with a mast and a j ib` pivoted at its inner end, of a vertically-movable dumping-arm, and a hoisting-rope connected with the jib and with the dumping-arm, substantially as described.

6.- In ahoisting apparatus, the combination, with a mast and with a jib pivoted to swing in vertical direction, of a vertically-movable dumping-arm, a hoisting-rope, and a movable sleeve on said dumping-arm, with which the with kthe mast provided with pulleys at its upper end and with a jib, of a vertically-movable frame or carriage provided witha pulley, a dumping-arm carried by said frame or carriage, and a hoisting-rope provided with a trip-sleeve adapted yto be moved by the du mp` ing-arm, substantially as described;

9. In a hoisting apparatus, the combination, withthe mast provided with .pulleys at its upper end, of ya vertically-swinging jib pro- ,vided at its outer end with a pulley and with a detent device, a vertically-movable'frame or carriage sustained by said mast and provided with a pulley, adumping-arm connected with said frame or carriage, and a hoisting-rope passing over said several pulleys and provided with a stop to engage with the detent andthe jib, and with a'movable trip-sleeve to engage with the dumping-arm, substantially as described.

1Q. In ahoisting apparatus, the combination, with the mast and the jib, of a verticallymovable dumpingarm having jaws to admit the hoisting-rope, and a suitable clutchl device' for retaining the rope within. said jaws, substantially as described. l

1l. In a hoisting apparatus, the combination, with the crane and the jib, ofa vertically-Inovable dumping-arm and a hoisting-rope provided with the verticallyfmovable trip-sleeve,

and a chain leading from said trip-sleeve for connection with the base of the tub, substan tially as described. i

12. In a hoisting apparatus, the combination, l

with the mast and the jib kkand the hoistingrope, of a vertically-m`ovable dumping-arm, a movable carriage for sustaining'said dumpingarm, and a weight connected 'with said carriage for restoring the same to the lowest position, substantially as described.

FRANK r. MILLS.

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